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Rifles, Reloading, Optics, Equipment
Gunsmithing
barrel diameters and muzzle brakes.
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<blockquote data-quote="308 nate" data-source="post: 951717" data-attributes="member: 1920"><p>Okay so here's what I am understanding.the minimum muzzle diameters is referring to Minor thread diameter.I will list UNR minor diameter Max Ref A3.</p><p>1/2x28tpi= .4574 so .140×2=280+bullet diameter.224= .504</p><p>9/16x24tpi =.5129 so this would work for.224.and .243 of your willing to cross the line.</p><p>5/8x24tpi =.5754 so .140×2=280+bullet diameter .308=.588 so .338 would be out of the question.My question then is this a line not to be crossed.I have talked to many barrel manufacturers as well and they recommend .15 minimum wall thickness on stainless, which I do follow for fluting .I would be interested to hear what your minimum thread diameter and pitch per caliber would be for stainless steel and chrome moly,and if you treat them differently?please forgive all of my questioning. I am just trying to understand what you're saying. I have literally put hundred of breaks on 30 caliber barrels with 1/2x28tpi with zero problems. in fact in the early days I even threaded a few .338 barrels 1/2×28tpi with no problem, although this does not meet my current guidelines. All the best .308Nate</p></blockquote><p></p>
[QUOTE="308 nate, post: 951717, member: 1920"] Okay so here's what I am understanding.the minimum muzzle diameters is referring to Minor thread diameter.I will list UNR minor diameter Max Ref A3. 1/2x28tpi= .4574 so .140×2=280+bullet diameter.224= .504 9/16x24tpi =.5129 so this would work for.224.and .243 of your willing to cross the line. 5/8x24tpi =.5754 so .140×2=280+bullet diameter .308=.588 so .338 would be out of the question.My question then is this a line not to be crossed.I have talked to many barrel manufacturers as well and they recommend .15 minimum wall thickness on stainless, which I do follow for fluting .I would be interested to hear what your minimum thread diameter and pitch per caliber would be for stainless steel and chrome moly,and if you treat them differently?please forgive all of my questioning. I am just trying to understand what you're saying. I have literally put hundred of breaks on 30 caliber barrels with 1/2x28tpi with zero problems. in fact in the early days I even threaded a few .338 barrels 1/2×28tpi with no problem, although this does not meet my current guidelines. All the best .308Nate [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
barrel diameters and muzzle brakes.
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